Art,

 

From the information provided, we have been unable to determine a potential cause for this kind of filtering to be happening for your clients. So far, our internal testing has been unable to replicate this behavior.

 

For more in depth assistance, I suggest opening a support ticket on this issue.

 

As we are unable to verify that this is an issue with SmarterTrack itself, I am going to mark this thread as Not A Problem.

Ok, it seems to be the public IP that our ST uses that was getting those emails blocked. I had assumed that since we were using Office 365 for the actual delivery that that would be the important information but seems that the original sending IP is still used.

Working through this now.

That's a very unusual situation. I've spoken with a couple members of our SmarterMail team, and they recommend looking over your Office settings to see if there is a flag that is causing it to relay your emails instead of acting as a standard SMTP server.

 

If you need additional help, you are welcome to open a ticket. If you do choose to open a ticket, please be prepared to share information on email headers for emails sent from SmarterTrack and from Office 365, as well as some logs from Office 365.